// 导入路由脚本文件中的属性
import {asyncRoutes,constantRoutes} from '@/router'
// 导入获取菜单数据的方法
import {getMenuList} from "@/api/user";
// 导入Layout组件
import Layout from '@/layout';

/**
 * 判断当前用户是否拥有该角色下的登录信息
 * */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles){
    return roles.some(role=> route.meta.roles.includes(role))
  }else {
    return true
  }
}

/**
 * 过滤出所拥有的菜单信息
 * */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    // 判断是否拥有相应的权限
    if (hasPermission(roles,tmp)){
      // 获取该路由对应的组件
      const component = tmp.component;
      // 判断是否有相应的组件
      if (route.component){
        // 判断是否有根组件
        if (component === 'Layout'){
          tmp.component = Layout;
        }else{
          // 获取对应的组件信息
          tmp.component = (resolve) => require([`@/views${component}`],resolve)
        }
      }
      // 判断是否有子菜单
      if (tmp.children){
        tmp.children = filterAsyncRoutes(tmp.children,roles)
      }
      res.push(tmp)
    }
  })

  return res
}

 const state ={
   routes: [],
   addRoutes: []
 }

 const mutations = {
  // 将路由信息保存到store中(Vuex)
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
 }

 const actions = {
  /**
   * 动态生产路由
   * */
  generateRoutes({ commit }, roles){

    return new Promise((resolve,reject) => {
      // 发送查询菜单数据的请求
      getMenuList().then(res => {
        // 存放对应权限的路由信息
        let accessedRoutes;
        // 判断状态码是否是200,如果是则表示成功
        if (res.code === 200){
          accessedRoutes = filterAsyncRoutes(res.data,roles)
        }
        // 将路由信息保存到store中
        commit('SET_ROUTES',accessedRoutes)
        resolve(accessedRoutes)
      }).catch(error => {
        reject(error);
      });
    })
  }
 }

 export default {
  namespaced: true,
   state,
   mutations,
   actions,
   generateRoutes
 }
